Other slides in this set

Slide 2

Preview of page 2

Here's a taster:

BY THE END OF THIS LESSON YOU WILL..
Know what propulsion is.
Give examples of how it is used.
Explain how it works in a machine.…read more

Slide 3

Preview of page 3

Here's a taster:

...WHAT IS IT?
Dictionary definition says it is ...
"The action of driving or pushing forward"
Propulsion moves things like spacecraft's or jet planes forward by
pushing something out of the back of the engine.
Everyday example.
Think of a balloon that you blow up and then release. The air rushing out
of the back pushes the balloon forward. This happens because of a
phenomenon described by Sir Isaac Newton: "every action has an equal
and opposite reaction."…read more

Slide 4

Preview of page 4

Here's a taster:

WHAT IS IT? ­ CONTINUED
A propulsion system is a machine that produces thrust to push an
object forward.
For example, On airplanes, thrust is usually generated through some
application of Newton's third law of action and reaction.
A gas, or working fluid, is accelerated by the engine, and the reaction
to this acceleration produces a force on the engine THRUST
In a machine propulsion is used to produce thrust to push and object
or the machine forward…read more

Slide 5

Preview of page 5

Here's a taster:

PROPULSION IN PLANE ENGINES
The Gnome was one of several rotary engines which were popular on fighter
planes during World War I.
The Gnome was unique in that the
intake valves were located within the
pistons. Otherwise, this engine used
the familiar Otto four stroke cycle. At
any given point, each of the cylinders is
in a different phase of the cycle. In the
following discussion, follow the master
cylinder with the green connecting rod.…read more

Slide 6

Preview of page 6

Here's a taster:

THE 4 STROKE CYCLE
An internal combustion engine
4 things in 1 cycle.
The 4 strokes are :-
- Intake
- Compression
- Power
- Exhaust…read more

Slide 7

Preview of page 7
Preview of page 7

Slide 8

Preview of page 8
Preview of page 8

Slide 9

Preview of page 9
Preview of page 9

Slide 10

Preview of page 10
Preview of page 10

Comments

No comments have yet been made

Similar Design & Technology resources:

See all Design & Technology resources »See all resources »